Tri-ureasil gel as a multifunctional organic-inorganic hybrid matrix

被引:25
|
作者
Molina, Eduardo Ferreira [1 ]
Marcal, Liziane [1 ]
Pereira de Carvalho, Hudson Wallace [2 ]
Nassar, Eduardo Jose [1 ]
Ciuffi, Katia Jorge [1 ]
机构
[1] Univ Franca, BR-14404600 Franca, SP, Brazil
[2] Karlsruhe Inst Technol, D-76131 Karlsruhe, Germany
基金
巴西圣保罗研究基金会;
关键词
MESOPOROUS SILICA SPHERES; ION-CONDUCTING ORMOLYTES; DRUG-RELEASE; PPO HYBRID; NANOCOMPOSITES; DELIVERY; DERIVATIVES; SYSTEMS;
D O I
10.1039/c2py21049e
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We report on a novel transparent, flexible, rubbery, and insoluble tri-ureasil organic-inorganic hybrid material with multifunctional characteristics and potential application in drug delivery, water purification, and photochromic materials. We obtained the tri-ureasil gels by the one-pot sol-gel route using 3-isocyanatopropyltriethoxysilane and glyceryl poly(oxypropylene) triamine of molecular weight 5000 g mol(-1) (Jeffamine (R) T5000). This approach generated a silica backbone covalently connected with poly(oxyalkylene) chains PPO(OCH-CH3CH2)(n) through urea bridges. We characterized the obtained materials by DSC, swelling tests, XRD, Si-29 NMR, and small-angle X-ray scattering (SAXS). The results attested that the tri-ureasil hybrids are potentially applicable as photochromic devices, drug delivery systems, and adsorbents of pollutants from contaminated waters.
引用
收藏
页码:1575 / 1582
页数:8
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